diff --git a/src/Modules/CalcDefence.lua b/src/Modules/CalcDefence.lua
index f223b13607..f106c9c12a 100644
--- a/src/Modules/CalcDefence.lua
+++ b/src/Modules/CalcDefence.lua
@@ -687,7 +687,9 @@ function calcs.defence(env, actor)
 	elseif modDB:Flag(nil, "MaxBlockIfNotBlockedRecently") then
 		output.BlockChance = output.BlockChanceMax
 	else
-		local totalBlockChance = (baseBlockChance + modDB:Sum("BASE", nil, "BlockChance")) * calcLib.mod(modDB, nil, "BlockChance")
+		local inc = modDB:Sum("INC", nil, "BlockChance")
+		local more = modDB:More(nil, "BlockChance")
+		local totalBlockChance = round((baseBlockChance + modDB:Sum("BASE", nil, "BlockChance")) * (1 + inc/100) * more)
 		output.BlockChance = m_min(totalBlockChance, output.BlockChanceMax)
 		output.BlockChanceOverCap = m_max(0, totalBlockChance - output.BlockChanceMax)
 	end
@@ -706,7 +708,9 @@ function calcs.defence(env, actor)
 		output.SpellProjectileBlockChance = output.ProjectileBlockChance
 		output.SpellBlockChanceOverCap = output.BlockChanceOverCap
 	else
-		local totalSpellBlockChance = modDB:Sum("BASE", nil, "SpellBlockChance") * calcLib.mod(modDB, nil, "SpellBlockChance")
+		local inc = modDB:Sum("INC", nil, "BlockChance")
+		local more = modDB:More(nil, "BlockChance")
+		local totalSpellBlockChance = round(modDB:Sum("BASE", nil, "SpellBlockChance") * (1 + inc/100) * more)
 		output.SpellBlockChance = m_min(totalSpellBlockChance, output.SpellBlockChanceMax)
 		output.SpellBlockChanceOverCap = m_max(0, totalSpellBlockChance - output.SpellBlockChanceMax)
 		output.SpellProjectileBlockChance = m_max(m_min(output.SpellBlockChance + modDB:Sum("BASE", nil, "ProjectileSpellBlockChance") * calcLib.mod(modDB, nil, "SpellBlockChance"), output.SpellBlockChanceMax), 0)